Resume bash script after reboot
I often write
bash scripts to automate common tasks in my projects. Often the script makes changes that requires a reboot. And when the machine finishes rebooting the script needs to resume from where it left.
Following script creates a temporary file that we use as a flag in the script to check if the script is resuming from reboot. We also temporarily update the
.zshrc to trigger the script automatically after reboot. When the script resumes, we remove the temporary file and the extra line we added in the bashrc or zshrc.
# filename: reload_bash_shell.sh # check if the reboot flag file exists. # We created this file before rebooting. if [ ! -f /var/run/resume-after-reboot ]; then echo "running script for the first time.." # run your scripts here # Preparation for reboot script="bash /reload_bash_shell.sh" # add this script to zsh so it gets triggered immediately after reboot # change it to .bashrc if using bash shell echo "$script" >> ~/.zshrc # create a flag file to check if we are resuming from reboot. sudo touch /var/run/resume-after-reboot echo "rebooting.." # reboot here else echo "resuming script after reboot.." # Remove the line that we added in zshrc sed -i '/bash/d' ~/.zshrc # remove the temporary file that we created to check for reboot sudo rm -f /var/run/resume-after-reboot # continue with rest of the script fi